Sewer trap



p 1933- w. A. WALLMAN 1,926,759

SEWER TRAP Filed om. 29, 1952 7 ie? J.

mm W erfl Wgbna z my, 5% fl ZMA Patented I Sept. 12, 1 933 PATENT,OFFICE SEWER TRAP Walter Wallman, Astoria, Oreg. Application October-29,1932. Serial No. 640,293

' 4 Claims. (01. 182-26) trap and pipe formed withoutdestroying anyportion of the pipe or the system. of which it forms a part. I

More specifically, the invention contemplates a trap composed of twotelescopic sections of any with the pipe by a relative movement of saidsections. r

With these and other objects in View, the invention consists in certaindetails of. construction and combinations and arrangements of parts, allas will be hereinafter more fully described and the novel featuresthereof particularly pointed out in the appended claims.

In the accompanying drawing, 1

Figure l is a sectional view, taken longitudinally of a pipe with. thepresent trap installed therein; a

Fig. 2 is a horizontal section onthe line 2-2 of Fig. '1;

Fig. 3 is an end elevation of the trap, looking into the trap from theopen end thereof. Y

'The pipe to'be sealed is indicated at 10, with the trap installedtherein. Said trap comprises two relatively movable sections 11,- 12,one of which carries a pivoted valve 13 whereby contents of the pipe mayflow in one direction only. In the present structure the valve is hingedat 19 40 to trap section 12 and formed with angular side edges. However,the contour of the valve is im material except it should form a tightfit with section 12. If desired, a gasket (not shown) can be placed onthe valve.

The two trap sections are adapted to telescope within one another to alimited extent, section 11 being adapted to receive the contiguous endof section 12 in the presentinstance and interposed between the twosections is an expansible element in the form of rubber gasket 14.

On the interior of each section there area plurality of' perforated lugs15, the perforations in the lugs of the two sections. being alined to 6heads 18, it is apparent that the two sections can desiredcross-sectional contour and a resilient. gasket that can be expandedinto sealing contact.

receive bolts 16. The end of each bolt, projecting be moved toward eachother and that such movement will expand the rubber gasket 14.

The installation of the trap in the pipe will be readily understood.Sufiice it to say, that with the sectionsv 11,- 12 separated to permitcontraction of gasket 14, the trap is slipped into the pipe and, whenproperly located, the sections drawn together to expand the gasket. Thiseffectively seals the space between the trap and pipe. withoutdestroying any portion of the pipe or of the system of which the pipeforms a part. Not only will the trap prevent the back flow of gases in apipe, but it may also be used to prevent rats gaining passage back andforth through pipes.

In addition to the ease'with whichthe trap can be installed, anotherprominent advantage of the present construction is that thecross-sectional contour of the trap sections is immaterial, so far aseffecting the seal between the trap and pipe is concerned. V

What I claim is: a

1. In a gas trap for sewer pipes, a pair .of relatively movable sectionsadapted to be inserted in a pipe, a-valve carried by one of saidsections,

an expansible sealing elementassociated with the trap sections, andmeans for moving said trap sections relatively to one anotherto expandsaid element against the interior of the pipe.

2. In a gas trap for sewer pipes, a pair of telescoping sectionsadaptedto be inserted'in a pipe, a valve associated therewith, and means foreffecting a seal between said trap and pipe comprising an expansibleelement movable into contact with the pipe wall by'a telescopingmovement of said sections.

, 3. In a gas trap for pipes, the combination of a pair of telescopingsections of less cross-sectional area than the pipe in which the trap isfused, a valve associated with said sections, and

said sections, and means for moving said sections toward. each other toexpand said annular member.

WALTER A. 'WALLMAN.

This installation of the trap can be made

